Appropriate biochar application methods can simultaneously mitigate Cd concentrations in different parts of soil and crops: A meta-analysis
文献类型： 外文期刊
作者： Zhang, Fan 1 ; Hu, Bingjie 2 ; Meng, Lin 1 ; Pang, Mengling 2 ; Chen, Yuqian 2 ; Song, Wenjing 1 ; Feng, Yanfang 3 ; Ma, Yan 2 ;
作者机构： 1.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China
2.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangze Plain, Minist Agr & Rural Affairs, Nanjing, Peoples R China
关键词： agricultural contaminated soil; biochar; Cd bioavailability; crop parts; meta-analysis
期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN： 0266-0032
年卷期： 2025 年 41 卷 1 期
页码：
收录情况： SCI
摘要： Agricultural soil contamination by cadmium (Cd) is a globally recognized concern, with biochar presenting considerable potential for remediation. However, the response of various crop components to biochar application for Cd pollution mitigation remains insufficiently understood. A literature review covering publications from 2017 to 2023 compiled 364 datasets from 60 studies to evaluate the responses of different parts of three crops to biochar treatment in Cd-contaminated soil. Findings indicated that biochar application reduced soil Cd bioavailability by 30.5% and decreased Cd accumulation in roots, shoots, leaves and grains by 31.3%, 34.0%, 25.3% and 43.1%, respectively, with the most pronounced reduction observed in grains. The efficiency of biochar in Cd remediation is influenced by its characteristics and application rates. Composite biochar, synthesized through co-pyrolysis of biomass with other materials, demonstrated the highest effectiveness in reducing Cd concentrations in crops. Pyrolysis conducted at 400-600 degrees C for 2-4 h significantly enhanced biochar's remediation potential, while biochar with a pH range of 6.5-8.5 and application rates above 2% notably decreased Cd absorption in crops. These results contribute valuable insights into the applicability of biochar materials in agricultural soil-crop systems, offering guidance on their anticipated effectiveness in mitigating Cd contamination.
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